Thrashing machine



Aug. 26 1924.

F. W. T. ZOEPKE THRASHING MACHINE Original Filed Feb. 18, 1922 INVENTOR. FEW ZZoqvfia. BY I 3- z i I ATTORNEYS Patented An 26, 1924.

UNITED STATES PATENT @FFICE.

FRED W. T. ZOEPKE, OF GREAT FALLS, LIONTANA.

THRASHING MACHINE.

Original application filed February 18, 1922, Serial N0.'537,519

March 17, 1923.

To alZ whom it may concern:

Be it known that I, FRED W. T. Zonrnn, a citizen of the United States,residing at Great Falls, in the county of Cascade and State of Montana,have invented certain new and useful Improvements in Thrashing Machines,of which the following is a specification, reference being had thereinto the accompanying drawings.

This invention relates to a thrashing machine, and the object of theinvention is the construction of a simple and efficient screening deviceadapted for use in a thrashing or harvesting machine".

This is a divisional application, growing out of my originalapplication, Serial No. 537,519, filed February 18, 1922, and entitledHarvesting machine.

with the foregoing and other objects in view, my invention comprisescertain novel combinations, constructions and arrangements of parts aswill be hereinafter described, illustrated in the accompanying drawings,and more particularly pointed out in the appended claim.

In the drawings:

Figure 1 is a perspective View of a screen ing device constructed inaccordance with the present invention.

Figure 2 is a sectional view, taken on line 2 2, Fig. 1, and looking inthe direction of the arrows.

Referring to the drawings by numerals, 1 designates the screening devicewhich comprises a plurality of screens 2, of similar construction,except that the top screen is of larger mesh than the middle screen andthe middle screen is oflarger mesh than the lower screen.

The screens 2 are pivotally mounted on vertical supporting-bars 3, andby means of horizontal pins 42 the screen device 1 is pivotallysupported upon a suitable support or a thrashing machine as specificallyillustrated in my co-pending application, Serial No. 537,519,hereinbefore mentioned.

Divided and this application filed Serial No. 625,863.

Rods 5 are pivotally connected at one end to some of the bars and theserods 5 are connected to a suitable operating mechanism, as clearlydisclosed in the aforesaid co-pending application.

I make no claim to the specific connection of the rods 5 as any ordinarymeans for shaking the screening device 1 may be employed for operatingsaid rods.

Each screen 2 is provided with downwardly and inwardly-extending ends 6so that the air from a fan 7 (as shown in the aforesaid co-pendingapplication) will be forced down close to the top of the two lowerscreens for blowing the chaff directly off the screen. The speed of thefan 7 will govern the force of air passing over the grain on thescreening device 1. Dirt or chad from the screening device will besucked up by a fan and discharged through the spout, as fully disclosedin said co-pend'ng application.

While I have described the preferred embodiment of my invention, andhave illustrated the same in the accompanying drawings, certain minorchanges or alterations may appear to one skilled in the art to whichthis invention relates, during the extensive manufacture of the same andI, therefore, reserve the right to make such alterations or changes asshall fairly fall within the scope of the appended claim.

What I claim is:

In a structure of the character described, a plurality of screenspositioned horizontally and disposed one above another in spacedrelation, each screen being provided with flanges extending downwardlyfrom its ends and at an inward incline whereby an ai blast passinglongitudinally between the screens may be directed towards the upnersurfaces of the lower screens. i

In testimony whereof I hereunto aiiix my signature.

FRED W. T. ZQEPkE.

